I've received numerous requests for a review of the Mission Io, the small form factor Mission FRFR amplifier speaker for use with modelers. Rather than just do my own, here's a really neat run down courtesy of Matt Blackett.
You can read Matt's full review in Guitar Player Magazine here: https://www.guitarplayer.com/gear/review-mission-engineering-gm-io
We just updated the Io to Version 4 software. V4 gives the Io some of the frequency response characteristics of it's big brother, the Mission Gemini.
The Mission Io V4 is available here: https://missionengineering.com/shop-2/products/amplifier/mission-io/